New Delhi: The Indian Council of Medical Research (ICMR) has clarified that no new strain of the H1N1 influenza virus has been detected in India, amid a recent rise in swine flu cases in Delhi and other parts of the country.
Senior ICMR scientists said the increase in infections is linked to the circulation of an existing seasonal influenza virus and does not indicate the emergence of a new or more dangerous H1N1 variant. The health body said there is no reason for public panic, while stressing that the situation continues to be closely monitored through regular surveillance.
Current Virus Has Been Circulating Since 2025
According to ICMR scientists, the Influenza A (H1N1) pdm09 viruses currently circulating in India belong to the A/Missouri/11/2025 (H1N1) pdm09-like virus strain. The viruses have been in circulation since 2025 and are not a newly identified strain responsible for the recent increase in cases.
The scientists also said the circulating influenza viruses are well matched with the vaccine strains recommended for the Northern Hemisphere, offering reassurance amid concerns over the rising number of infections.
Delhi Reports Sharp Rise in H1N1 Cases
The clarification comes as Delhi has reported a significant number of H1N1 cases this year. According to reported government data, the city had recorded 1,777 H1N1 cases in 2026, with the virus accounting for a large share of Influenza A infections reported in the national capital.
Health experts have attributed the increased transmission partly to seasonal conditions, including the monsoon period, when changes in weather, humidity and increased indoor crowding can contribute to the spread of respiratory viruses.
Most Cases Are Mild, but Vulnerable Groups Need Caution
ICMR sources said seasonal influenza, including H1N1, is mostly self-limiting, meaning that many people recover with appropriate rest and medical care. Common symptoms can include fever, cough, headache and body aches.
However, young children, elderly people, pregnant women and individuals with underlying health conditions may face a greater risk of complications. Health experts have advised people in high-risk groups to seek timely medical attention if symptoms persist, worsen or become severe.
ICMR Urges Calm as Surveillance Continues
The ICMR’s clarification is aimed at addressing concerns that the recent surge could be linked to a completely new strain of the virus. Scientists have emphasised that there is currently no evidence of such a development and that public health authorities are continuing surveillance and taking necessary measures.
With influenza activity increasing in several areas, experts have urged people to follow basic respiratory hygiene, avoid unnecessary exposure when ill and seek medical advice when symptoms become severe or do not improve.
While the rise in H1N1 cases has prompted closer monitoring, the ICMR has made it clear that no new H1N1 strain has been identified in India and there is currently no cause for panic.
